There's no real goal to the game, so, you only need to know that you use arrow keys to move.
I wanted to make something with physics, and I noticed the physics was a lot like ice, so I made the character an ice cube named Ici. I might use this character in other things as well. You could use this as an engine, but it's not as reliable as the @griffpatch platformer engine, so, be aware of that.